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Net Income Per Share:
 6 Months Ended
Jun. 30, 2012
Earnings Per Share [Abstract]  
Net Income Per Share [Text Block]
Net Income Per Share:
 
Net income per share is computed by dividing net income by the weighted average number of common shares outstanding. Diluted net income per share is computed by dividing net income by the weighted average number of common shares outstanding plus dilutive securities. Dilutive securities are outstanding common stock options and restricted stock units(excluding stock options with an exercise price in excess of the average market value for the period), less the number of shares that could have been purchased with the proceeds from the exercise of the options, using the treasury stock method. Options that are anti-dilutive because their exercise price exceeded the average market price of the common stock for the period approximated 5,000 and 7,000 for the three months ended June 30, 2012 and 2011, respectively, and 3,000 and 145,000 for the six months ended June 30, 2012 and 2011, respectively.
 
The following table presents the calculation of net earnings per common share (“EPS”) — basic and diluted.
 
 
Three months ended June 30,
 
Six months ended June 30,
 
2012
 
2011
 
2012
 
2011
Net income
$
9,149

 
$
9,493

 
$
16,750

 
$
17,566

Weighted average number of common shares outstanding (for basic calculation)
14,179

 
13,852

 
14,067

 
13,772

Dilutive securities
441

 
405

 
417

 
394

Weighted average common and common equivalent shares outstanding (for diluted calculation)
14,620

 
14,257

 
14,484

 
14,166

EPS — basic
$
0.65

 
$
0.69

 
$
1.19

 
$
1.28

EPS — diluted
$
0.63

 
$
0.67

 
$
1.16

 
$
1.24